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arXiv 2107.12092cond-mat.mtrl-sci
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确定导致吸附能标度关系中出现负斜率的关键表面描述符

Identifying the critical surface descriptors responsible for the appearance of negative slopes in the adsorption energy scaling relationships

Swetarekha Ram, Seung-Cheol Lee, Satadeep Bhattacharjee

摘要:

吸附能标度关系现在已经发展超出了原来的形式,这是更有针对性的催化位点的优化和减少计算成本的模拟。近年来,人们对吸附能标度关系的研究主要集中在过渡金属表面以及复杂分子的反应。这种比例关系的分解导致激励发现具有增强能力的新型催化剂。在这项工作中,我们报告了我们广泛的研究之间的线性标度关系(LSR)的氧(O),一个VIA族元素与相邻的元素,如:IIIA族(硼(B),铝(Al)),IVA(碳(C),硅(Si)),VA(氮(N),磷(P))和VIIA(氟(F))的磁性表面。我们发现,只有O对N和F的斜率是正的,其余的斜率是负的。本模型基于多个表面描述符,特别是自旋平均d带中心和表面的磁矩,而原始标度理论(Phys.Rev.Lett. 99,016105(2007))基于单个吸附物描述符:吸附物价。

英文摘要:

Adsorption energy scaling relationships have now developed beyond their original form, which was more targeted towards the optimization of catalytic sites and the reduction of computational costs in simulations. The recent surge of interest in the adsorption energy scaling relations is to explore the surfaces beyond the transition metals (TMs) as well as reactions involving complicated molecules. Breakdown of such scaling relationships leads to motivating the discovery of novel catalysts with enhanced capabilities. In this work, we report our extensive study on the linear scaling relation (LSR) between oxygen (O), a group VIA element with elements of neighbouring groups such as: Group IIIA (Boron (B), Aluminum (Al)), IVA (Carbon (C), Silicon (Si)), VA (Nitrogen(N),phosphorus(P)) and VIIA (Florine(F)) on magnetic bimetallic surfaces. We found that the slope is positive for only O versus N and F, remaining of the slopes are negative. The present model is based on multiple surface descriptors, particularly spin-averaged d-band center and the surface's magnetic moment, whereas the original scaling theory (Phys. Rev. Lett. 99, 016105 (2007)) was based on a single adsorbate descriptor: adsorbate valency.

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